39
reduce the current stages by the value entered for Loadshed
Demand delta. The Maximum Loadshed Time is the defines
the maximum length of time that a loadshed condition is
allowed to exist. The control will disable the Redline/Loadshed
command if no Cancel command has been received within the
configured maximum loadshed time limit.
Cooling Set Point (4 to 20 mA) —
Unit operation is
based on an external 4 to 20 mA signal input to the Energy
Management Module (EMM). The signal is connected to
TB6-3,5 (+,–). Figure 19 shows how the 4 to 20 mA signal is
linearly calculated on an overall 10 F to 80 F for both Water
and Medium Temperature Brine COOLER FLUID configura-
tions. See Table 30 for configuration instructions.
LEGEND
EMM —
Energy Management Module
Fig. 19 — Cooling Set Point (4 to 20 mA)
100
(38)
80
(27)
60
(15)
40
(4.4)
20
(-7)
0
(-17)
4
6.3
8.6
10.9
13.1
15.4
17.7
20
4 TO 20 mA SIGNAL TO EMM
SET
POINT
,
F
(C)
90
(32)
70
(21)
50
(10)
30
(-1)
10
(-12)
(FLUD = 2) MINIMUM
SET POINT 14 F (-10 C)
(FLUD = 1) MINIMUM
SET POINT 38 F (3.3 C)
MAXIMUM
SET POINT
70 F (21.1 C)
